If you have a cloud hosting package and you create an email address, you may consider the option to send out and receive emails for granted, however, this isn't always the case. Sending e-mail messages is not always included in the web hosting packages that companies offer and an SMTP service is necessary to be able to do that. The acronym signifies Simple Mail Transfer Protocol and this is the software application that allows you to send out e-mail messages. If you use an e-mail application, it connects to the SMTP server. The latter then searches the DNS records of the domain name, which is a part of the receiving address to find out which email server handles its e-mails. After some system information is interchanged, your SMTP server provides the message to the remote IMAP or POP server and then the e-mail is finally delivered in the corresponding mailbox. An SMTP server is required if you work with some sort of contact form too, so if you use a cost-free hosting package, as an example, it is very likely that you won't be able to use this type of form since many free of charge website hosting service providers do not allow outgoing emails.